8 



THE EGG. 



notably in the lower groups, are almost smooth, 

 but under the microscope some fret- 

 work of cells may be discerned upon 

 the walls of all. Others again, and 

 they form a large proportion, are 

 buttressed upon the 

 sides with upright ribs, 

 SStSri&i which may be seen by 

 the naked eye ; some- 

 times these ribs are coarse and ir- 

 regular, running in zigzag lines from 

 base to summit, and rendering the 

 egg scarcely distin- 

 guishable from those ^&iS^ f 

 with the coarser net- 

 work of cells ; in others, however, 

 FIG. 11. -Egg of and these are generally confined to 



Eurymus Philo- J 



the higher types [Fig. 13], the ribs 





are excessively compressed, mere films, placed 

 edgewise to the body of the egg, glistening in the 

 sunshine like dew-drops, and in- 

 creasing in size to the 

 summit, where they 

 often form a sort of 

 crown. In still others 

 the ribs thicken and FIG 13 _ E f 

 broaden above, so that the summit Vanessa Ataiama, 

 looks as if covered with little hil- 

 locks [Fig. 14] ; or the ribs may die out before 



FIG. 12. Egg of 



Chrysophanus 



Thoe, X 11. 



